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A new digital three component broadband seismic
station has been installed last year in Villavallelonga
(VVLD), Central Italy, equipped with a Guralp CMG-
3T sensor, at 120 seconds and sampling at 50 Hz. The
station is part of the new digital network developed
by Istituto Nazionale di Geofisica e Vulcanologia in
Rome, but actually integrated in the Italian Seismographic
Network. VVLD sends data to the Data Center
in Rome using wired digital communication. It implements
a 24 bit AD converter with an effective dynamic
range of 140 dB. This combined with the characteristics
of the broadband sensor, give the possibility to
construct a good quality dataset of local and regional
earthquakes. This study is a preliminary analysis of
the collected data, aimed to emphasize the usefulness
of single-station broadband data for local and regional
seismicity in general, besides of path calibrations. We
selected 20 events in the database of about 1000, within
a distance range from 50 to 1300 km and magnitudes
greater than 3.0, from May 1 to August 31, 2001. We
calibrated the local structure around the station, since
at very short epicentral distances the effects of the
structure and source are easily separated,and finally we
used these results to enable the waveform inversions at
larger distances.